.header .nav, .header .nav > ul {
    height: 40px;
}

.header .nav ul {
    color: white;
    font-size: 12px;
    letter-spacing: 1px;

    vertical-align: top;
}

.header .nav .u1 {
    float: left;
    width: 976px;

}

.header .nav .u2 {
    float: right;
    width: 245px;
}

.header .nav li {
    float: left;
    line-height: 40px;
    margin-left: 10px;
    color: #a5a3a3;
}

.header .nav li a {
    color: #a5a3a3;
}


.header .nav li:after {
    content: '|';
    padding-left: 10px;
    color: #a5a3a3;
    opacity: 0.1;
}

.header .nav li:last-child:after {
    display: none;
}

.header .nav .active a,
.header .nav li:hover a {
    color: #fff;
    transition: all .1s;
}

.download-btn {
    position: relative;
}

.download-btn:hover .download-box {
    display: block;
}

.download-box {
    display: none;
    position: absolute;
    left: 50%;
    margin-left: -72px;
    width: 124px;
    height: 148px;
    z-index: 99;
    background-color: #ffffff;
}

.download-box img {
    width: 90px;
    height: 90px;
    padding-left: 17px;
    margin-top: 20px;
}

.download-box h5 {
    margin-top: -20px;
    color: #000;
    text-align: center;
}

.download-box .triangle {
    position: absolute;
    left: 50%;
    margin-left: -5px;
    top: -10px;
    width: 0;
    height: 0;
    border-bottom: 5px solid #ffffff;
    border-top: 5px solid transparent;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
}

.banner {
    margin-top: 50px;
    position: relative;
    height: 460px;

}

.swiper {
    background: url("./c162874708ca7856f972ef5eee976e3a.webp");
}

.cate-list > ul {
    float: left;
    position: absolute;
    width: 232px;
    height: 460px;
    background-color: rgba(163, 163, 163, .2);
}

.cate-list > ul > li:hover {
    background-color: #f40;
}

.cate-list > ul > li::after {
    content: ">";
    font-weight: bolder;
    color: #fff2f3;
    float: right;
    margin-top: 5px;
    margin-right: 20px;
    vertical-align: baseline;
}

.cate-list > ul > li > a {
    text-decoration: none;
    color: #ffffff;
    font-size: 12px;
    font-weight: bold;
    line-height: 45px;
    text-align: center;
    height: 45px;
    padding-left: 30px;
}

.cate-content {
    display: none;
    position: absolute;
    left: 232px;
    top: 0;
    width: 994px;
    height: 460px;
    background-color: #ffffff;
}

.cate-content > ul {
    float: left;
}

.cate-list li:hover > .cate-content {
    display: block;
    box-shadow: 1px 5px 5px #000;
}

.cate-content > ul > .item {
    overflow: hidden;
    box-sizing: border-box;
    width: 240px;
    height: 76px;

    position: relative;
}

.cate-content > ul > .item > a, .cate-content > ul > .item > img {
    display: inline-block;
}

.cate-content > ul > .item > img {
    float: left;
    height: 40px;
    margin-top: 18px;
    margin-left: 30px;
}

.cate-content > ul > .item > a {
    float: left;
    line-height: 76px;
    margin-left: 20px;
    color: #000;
    font-size: 14px;
    text-decoration: none;
}
